Process of treating petroleum oil



March ZZ, 19.32. s. EGLOFF PROCESS OF TREATING PETROLEUM QIL Original Filed Oct. 27, 1923 Patented Mai. 22, 1932 UNITED STATES PATENT OFFICE GUSTAV EGLOFF, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNIVERSAL OIL PRODUCTS COM- IPAINY, OF CHICAGO, ILLINOIS, A CORPORATION OF SOUTH DAKOTA PROCESS OF TREATING PETROLEUM OIIr' Application filed October 27, 1923,

This invention relates to improvements in process of treating a residuum produced from cracked petroleum oil, the object being to convert more or less of said residuum to high grade lubricating stocks by polymerization. The invention will appear from the following description, reference being had to the accompanying drawing, in which the single figure is a somewhat diagrammatic view,

partly in side elevation and partly in vertical section of the apparatus.

Referring to the drawing (1) designates the furnace, in which is mounted the heating coil (2). The raw oil to be treated is to be 1 fed by means of feed pump (3) and feed line (4) to the coil 2, from the coil 2 the oil passes through transfer line (5) having control valve (6) into expansion chamber (7). The vapors pass out of the top of expansion chamher through outlet (8) having control valve (9) to the lower end of dephlegmator (10). This dephlegmator has superimposed baflles (11) and a vapor outlet line (12) having control valve- (13) leading to condenser coi (14). The condenser coil (14) is connected to receiver (15), which receiver has gas control valve (16) and liquid drawoff controlvalve (17 The residue is drawn 01f from the expansion chamber through pipe (18) and throttle valve (19), while the refluxcondensate" may be returned to the system through pipe (20) connected to the lower end of the 'dephlegmator at one end. and at the other end to the feed line (4).

As a feature of the invention, the residuum after passing the valve (19) is delivered at atmospheric pressure into the receiving ta (21) This tank (21) is provided with a plurality of fins or blades (22) suitable motor as shown. uum enters the tank (21) molten aluminum chloride, pipe (23) having suitable control valve (24) As the mixed residuum and molten aluminum Before the residit is mixed with chloride enter the tank (21) they are rather vio1ently agitated with the result that the lubricating products.

driven from any Serial No. 671,072. Renewed June 19, 1929.

which are suitable for high grade lubricating stock. The residuum so treated may be drawn off from tank (21) through line (25) controlled by valve (26). -With the exception of the treating tank (21), the whole system may be, if desired, operated under suitable superatmospheric pressures and under temperatures suitable for cracking oil.

After the residuum has been treated' with aluminum chloride in the manner stated, it may be distilled with steam or under vacuum and separated into suitable fractions which may be acid treated where necessary, neutralized and water washed.

I claim as my invention:

A process for treating residual oil resulting from the cracking of hydrocarbons comprising removing the heated residual oil from a zone of cracking, reducing the pressure on such heated residual oil, admitting to such heated residual oil subsequent to the reduction in pressure thereon, a supply of molten aluminum chloride, collecting a quantity of 1 the residual oil and molten aluminum chloride in an unheated zone, agitating the mixed residual oil and molten aluminum. chloride in said unheated zone GUSTAV EGLOFF.

injected through aluminum chloride acts chemically uponthe residuum and tends to produce very stable hydrocarbons of a polymerized character to form polymerized 

